langchain==1.4.4
LangChain 1.4.4 fixes an issue in SummarizationMiddleware by retrying summary steps on context overflow, raises the minimum FastMCP dependency to 4.0.11, and updates several core dependencies.
Why this signal matters
LangChain 1.4.4 addresses a context overflow issue in SummarizationMiddleware by adding a retry mechanism for summary steps ( 41159). Additionally, it bumps the minimum FastMCP dependency to version 4.0.11 ( 41054) and updates internal dependencies for libs/langchain v1, including langgraph-sdk (to 0.4.4), fsspec (to 2026.9.0), multidict (to 6.9.1), pyjwt (to 2.15.0), and urllib3 (to 2.8.0).
Actionable summary
LangChain v1.4.4 release: Fixes SummarizationMiddleware to retry summary steps upon context overflow. Updates dependencies including minimum FastMCP to 4.0.11, langgraph-sdk to 0.4.4, fsspec to 2026.9.0, multidict to 6.9.1, pyjwt to 2.15.0, and urllib3 to 2.8.0.
- Agent usefulness
- 77/100
- Confidence
- 96%
- Canonical data
- JSON + Markdown
What builders should check
- Upgrade langchain to version 1.4.4 if relying on SummarizationMiddleware context overflow handling.
- Ensure FastMCP is at least version 4.0.11 in environments using LangChain MCP integrations.